Both of Ben's job interviews were with characters who had previously appeared: Barney first appeared in Leslie's House (2010) as a Rec Center instructor, followed by Telethon (2010); Dennis Feinstein is the man Tom tried to sell his scent to in Indianapolis (2011).
One suggestion at the PCP meeting is "clear eyes, full hearts, can't lose" from the series Friday Night Lights (2006), which creator Michael Schur is a fan of.
When Leslie is given her ID back, the ID shows that she is an essential employee as previously seen when the government shut down and she was raised from non-essential.
According to Ben's resume, his full name is Benjamin Wyatt, he lives at 3095 Ash Avenue, Pawnee, IN 47998, his phone number is 812-555-0122, and his email is wyattben@benwyatt.in.usa.
While Leslie is meeting with Chris after being abandoned by her campaign advisers, the old-looking books in the glass cabinet include popular novels with their dust jackets removed. These include Plains of Passage by Jean M. Auel, and a book by Dean R. Koontz (title illegible).